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The Future of NWS Technology – NEXRAD

The Future of NWS Technology – NEXRAD. 1st NWS Severe Weather Technology User Meeting July 12-14, 2005. Mike Istok NPI Development Manager NWS – Office of Science and Technology Michael.Istok@NOAA.GOV. Overview. NEXRAD Product Improvement: Progress and plans

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The Future of NWS Technology – NEXRAD

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  1. The Future of NWS Technology – NEXRAD 1st NWS Severe Weather Technology User Meeting July 12-14, 2005 Mike Istok NPI Development Manager NWS – Office of Science and Technology Michael.Istok@NOAA.GOV

  2. Overview • NEXRAD Product Improvement: Progress and plans • Schedules: WSR-88D 7-11, SPG 1-3, AWIPS 7-10 • Radar Product Distribution Enhancements • Open RDA • Mesocyclone Detection Algorithm • Environmental Data Ingest • TDWR • Super Resolution Data • Dual Polarization • Common Operations and Development Environment • Priorities: Radar Data Capability Enhancement • Summary

  3. NPI: Progress and Plans

  4. Schedules: WSR-88D 7-11, SPG 1-3, AWIPS 7-10 Build 10+, OB9+, SPG 2+ dates are tentative

  5. Recent Radar Product Distribution Enhancements (Build 6, 7) • Compress 8 bit products (Z, V, DHR) • Available for WAN OTR and frame relay dedicated users • Class 2 user access to products in RPG database • Increase RPS list limit to 160 products (AWIPS OB4.2) • AWIPS-WAN based interfaces • OTR Flow Control 64 kbps from NWS WSR-88Ds • OTR Flow Control 28 kbps from DOD and FAA WSR-88Ds • AWIPS configuration change for Dual WAN OTR port use • Implement frame relay links • 100 kbps allocated to product distribution function • DOD & FAA WSR-88Ds • Supplemental NWS WSR-88Ds radar • LAN-LAN interface for RFCs co-located with WSR-88Ds

  6. Future Radar Product Distribution Enhancements (Build 8, 9) • AWIPS-WAN based interfaces • Aggregate Flow Control • 128 kbps from NWS WSR-88D • 64 kbps from DOD and FAA WSR-88Ds • Add two more WAN OTR ports (44-45) • Add one dedicated WAN port (29) for service backup and/or central radar product collection backup (AWIPS OB6) • Default Product Generation • Add products to ensure availability for class 2 users • Increase frame relay bandwidth to DOD/FAA RPG • To increase Aggregate Flow Control to 128 kbps • Generate products for non-assoc. user requests • RCS, VCS, ULR, USP, USD, USW, VAD, and CS

  7. Open RDA • Accurate base data time stamps (obtained via GPS) • Base data radials centered on the half degree(+/- 0.04 deg) • Elevation cuts contain 360 radials (i.e., no overlap) • New signal processor and clutter filter scheme changes quality of base data • General Status Message includes RDA software version and redundant channel number (AWIPS OB6) • Suppression level and Channel removed from Clutter Filter Control (CFC) product (AWIPS OB6) • Calibration constants in GSM and Reflectivity products changed range and/or format • Several changes to Level 2 data format and content

  8. Mesocyclone Detection Algorithm: Completion • Central Collection and NCDC archive of MD product • Alerting, CR, and RCM • New MDA Alerting Categories • Use spare Volume(16) and Forecast(32) Group categories • Alert Thresholds based on Strength Rank. • Proposed Defaults: T1=1, T2=2, T3=3, T4=4, T5=5, T6=6 • Modify CZ Combined Attributes (MESO) column • Change from MESO, 3DCO, UNCO or NONE to 1-25(Strength Rank) or NONE • Modify Radar Coded Message (RCM) product • NMESnn: The total number (nn) of mesocyclones (NMES) detected at or above the Minimum Display Filter Strength Rank is encoded. (Example: /NMES05:) • Mnnggg: The location (ggg) and strength rank (nn) of each Mesocyclone at or above the Minimum Display Filter Strength Rank is encoded using the three-letter grid box designator. (Example: M13NLD). • Retire legacy Meso algorithm (M, MRU)

  9. Environmental Data Ingest • AWIPS provides hourly update to RPG • AWIPS config. will determine which RPG is being served • 3-D grid of temperature, dew point, wind speed and direction • Provide data within range of ~200 nmi from radar • RUC model runs every 3 hours and provides output on 40 km grid • Analysis, 1 hour, 2 hour • 40 levels in the vertical • MSCF option to use/not-use for automatic updating of: • Environmental winds table (velocity dealiasing algorithm) • Altitude of 0 and -20 deg C temperatures (hail algorithm) • MSCF will provide simple data viewer to check data quality • Possible future uses • Severe storm algorithms, determine precip. type, compute heights

  10. TDWR

  11. Comparison of TBWI (20.7deg) and KLWX (19.5 deg)

  12. Super Resolution • Base Reflectivity and Velocity products • Initially, just on split cuts • New products • ½ degree radials • ¼ km range bins • Signal processing techniques to reduce variance • Over-sampling • Whitening • Algorithm tuning • Mesocyclone • TVS • Precipitation

  13. May 10, 2003 03:42 UTC 1 deg / 1 km Resolution 0.5 deg / 0.25 km Resolution

  14. Dual Polarization • Base data products • Differential Reflectivity (ZDR) • Correlation Coefficient (RHO) • Differential Phase Shift (PHIDP) • Derived products • Specific Differential Phase (KDP) • Hydrometeor Classification algorithm (HCA) • Convective and winter precipitation versions • Discriminate hail, rain, snow, biological targets, and clutter • Rainfall accumulation algorithm • Based on a combination of polarimetric parameters KDP and ZDR, and the current linear horizontal reflectivity parameter Z

  15. Supercell Thunderstorm Producing Softball-Size Hail

  16. WSR-88D Common Operations and Development Environment (CODE) • An algorithm development environment for the WSR-88D • Contains software and guidance to create the development environment on an Intel PC running Red Hat Enterprise Workstation Linux or a Sun Ultra-Sparc/Blade with Solaris 8 • Provides a 'clone' of a WSR-88D Radar Product Generator on a workstation which can run existing and user-created algorithms by ingesting WSR-88D Level 2 data • Also used to study past weather events by ingesting Level 2 data obtained from NCDC and creating products for analysis • Includes visualization tools, data sets, documentation, and the operational RPG baseline source code • Developed and maintained by the NWS OS&T • Updated with each new WSR-88D RPG software release • Used by groups that implement software for future RPG releases, technique developers, and researchers • A Public Edition is available at http://weather.gov/code88d/

  17. All Tilts Frame Expansion(1.8)* Super-Resolution Base Z and V Products(1.8) MDA(2.0), TVS(2.8), PPS(2.8) Dual Polarization Base Data products(2.0) HCA(2.0),QPE(2.0) NSSL/FSI 4D Radar (2.3)* Plan View Display of VWP (2.5)* All Tilts Navigation Tool (2.5)* Estimated Actual Velocity (3.3)* Data Quality SZ-2, SZ-1, Staggered-PRT, Oversampling, Whitening (3.2) Lower Elevation angles(3.2) New VCPs(3.4) 300 km Doppler Range(4.3) MDA: Alerting, CR, RCM (3.3) SPG(TDWR) Products VWP(4.8), Velocity Dealiasing (3.8) VIL(6.0) MDA(4.0), TVS(3.8), SCIT(5.3) PPS(5.3) CR(6.3), ULR(6.3) Integ. Radar/Enviro. Sampling(4.0)* MIGFA (3.8) Enviro. Data From AWIPS (4.3) Prototype Radars/Products (4.3) Freezing Level ULR Request (4.3)* Moving Point Meteogram (4.3)* Hail Tracks (4.3) ASR-11 (4.5) TVS Tracking (4.8) DVL at a higher scale (5.0) CANRAD (5.0) ARSR-4 (5.0) Rotation Tracks (5.5) SCIT Rapid Update (5.8) Probabilistic Precip. Est. (5.8) VWP Improvements (6.0) VWP Wind Averaging/Stepping (6.3)* Uniform Winds Algo. (7.0) 4km EET (8.3) Priorities: Radar Data Capability Enhancements * - AWIPS only

  18. Summary • Priorities determined with field input • 1. Dual Polarization • 2. Super Resolution • 3. SPG products using TDWR data • 4. Whatever else can be done with remaining resources • OSIP followed to ensure conops, requirements and business case supports implementation • Resource profiles limit quantity of change • AWIPS & NEXRAD SRECs determine release content • Longer time between major releases lengthens time to deployment and complicates integration • Prototype, test, and demo platforms representative of the intended operational environment can foster design refinement and reduce the risk of deploying defects • User input and feedback is critical

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